Stoker



Nov. 37 1925.

, J. A. CAREY STKER Filed Nov. 1

3 Sheets-Sheet l Nov. 3 1925- Filed Nov. 1, 19,19

' 1,560,203 J. A. CARI-:Y Y

STOKER 5 Sheets-Sheet 2 can a' M @Hoz/maf cli/w3 MMLW+W Patented Nov. 3, 1925.

UNiTED srATEs 1,560,203 PATENT oFFicE.

JAMES A. CAREY, OF NEW YORK, N .Y., ASSIGNO'R TO THE STANDARD STOKER C0., INC., OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

STOKER.

Application led November 1, 1919. Serial No. 335,100.

To all whom z't may concern.'

Be it known that I, J AMES A. CAREY, a citizen of the United States, residing at New York, in the county and State of New York, haveinvented certain new and useful Improvements in Stoker's, of which the following is a full, clear, and exact description.

This invention relates to improvements in stokers and particularly to improvements in stokers of the type shown in patent to Williams, 1,118,985, and patent to lVilliams, 1,099,956.

It has been found desirable in locomotive practice to reduce to a minimum all parts requiring attention by firemen, engineers or oi'lers inasmuch as operating diiliculties have been found to be largely due to neglect and inattention by them.

It is among the objects of the present invention to reduce to a minimum all gearing and associatedI mechanism which connects the conveyorsto each other and, to the engine and also to provide a self-operating lubricating system which requires no attention other than occasionally filling one compartment with oil.

Other objects reside in the provision of a` novel mounting for the horizontal conveyor whereby the use of depending bearings in theconveyor tube is avoided, thereby cutting down the possibility of clogging and permitting a more uniform advance of material therethrough. According to the present invention-*one of the bevel gears r`which drives the vertical conveyor Vis coaxial with and forms a part of the horizontal conveyor screw and also is arranged to form a bearing for one end of the rotary screw of the horizontal conveyor. By reason of the arrangement for driving the vertical conveyor I am enabled to dispense with the rear gearing and shafting which was employed for driving the .bevel gearing of this conveyor and thereby eliminate mechanism requiring attentio For driving the horizontal conveyor I employ 'a worm wheel coaxial with the rotary screw and mounted withinthe passaged structure. This wheel is driven by a Worm gear mounted directly on the engine shaft.

This worm wheel also has a portion which forms-a section of the convolutions of horizontal conveyor screw and has portions thereof Awhich form a bearing to co-operate COIlVeyOI'.

with the bevel gear in supporting the conveyor screw inthe tube. The convolution of the conveyor screw forming a part of the aforesaid bevel and worm gears is uniform in pitch with the screw itself, whereby an even and non-accelerated or ,non-retarded movement' of coal or other material through the device is attained.

Other objects reside in the novel methods of mounting the bevel and worm gears whereby the material being advanced does not have access to the gears with the possible consequence of wearing or injuring them or` Fig.4 is a similar detail view of the worm Wheel which drives and is a part of the convolutions of the .horizontal conveyor.

In molte detail, T isa tender and F a fire box. A conveyor screw 10 is adapted-.to take coal from the tender T and deliver the same to a conveyor screw 11 which rotates within telescoping troughs 12 and 13. -These telewith the usual ball joints 14 and 15 which permit relative movement of thetender and locomotive. The conveyor screw is likewise sectional and is provided with interconnecting universal joints 16 and 17 to permit the conveyor sections to assume varying angles 9o scoping troughs at their ends arev provided as relative movement of tender and locomotive occurs.' e

' From conveyor screw 11 the coal is delivered tothe rotary conveyor screws 18, 18", 18C, 18d and thence to the vertical screw conveyor 19 which delivers the coal .to the fire f box. rIhe horizontal conveyor screw is made upof four axially. alignedv sections which will hereafter be described in detail The horizontal conveyor screw rotates ir a horizontal passaged structure made up o` two trough sections 2Q and 21 which` are interconnected by a gear housing 22. These sections 20 and 21 are preferably bolted to the gear housing b shown in Fig. 4. ection 20 also has at the end adjacent the ball joint an annulus 23 of hard metal which co-'operates with a raised portion 24 of the periphery of screw 18 to pick up the coal or other material. The annulus may be replaced when worn and is adapted to form a bearing for one end of the screw section 18a.

Disposed between the conve or screws 18*iL and 18c is an intermediate section 1,8b having a pitch equal to the pitch of the two screws 18a and 18. As clearly shown in Figs..1 and 4, the horizontal screw sections 18, 18b and 18 cooperate to form a continuous conveyor screw having .blades or convolutions extending from endto end of the screw and being of uniform pitch throughout.I

In this respect this construction differs from the constructions heretofore used in which the portion of the screw corresponding to 18b had an increased pitch. I find it advantageous to have a uniform pitch throughout the length ofthe screw as the material is advanced uniformly without accelerating or retarding the iiow. This mode of o eration is particularly advantageous w ien depending bearingsl are omitted from the troughs as in the present construction.

The periphery of the screw 18bis extended as shown in Fig. 4 and has cast integrally therewith a worm wheel 25having annular extensions 26 at the sides thereof. 'The outer 'face of the annular extensions 26 bear upon annular members 27 carried by housing 22 toforma bearing for the worm wheel and likewise a bearing support for one ortion of the horizontal screw conveyor. inner faces of these extensions 26 form a bearing surface for felt rings 2x8 which are retained in grooves in the, ends of troughs 2O and 211. The function of these parts is to forma seal and prevent dirt or coal-dust entering the gear case.

In .order that the dependin bearings in the passaged structure be eliminated I provide means for supporting screw sections 18' and 18"" from the section of the screw 18".

Aninterior'shaft shown in dotted lines at d 30 in Fig. 4 extends throughtthe center of screw conveyor section 18, 18b an'd into section 18c and supports sections 18a and 18 from 18. I also provide for the driving of sections 18a and 18c from section 18".

y by means of rectangular projections 31 which extend into rectangular jaws 32 in sections" 18 and 18C. ,4 it Vfollows that the wormv gear annular'.

From the above construct-ion flanges 26 form a supporting bearing for the sections 18a and 18 of the screw conveyor. A

I'l` also propose to drive the conveyor means of cap nuts best screw sections by means of a square shaft litting within square socket openings in lsections 18, 18b and 18.

In order to provide a bearing support for the opposite end of conveyor screw section 18c and eliminate the previous objectionable depending bearing and at the same time provide a direct drive for the vertical conveyor screw 19, I provide a bevel gear 33 which is cast integral with screw section 18d and which, like section 18", has the same pitch as sections 18n and 18". Gear 33' has inte ral annular 'extensions 34, the outer peri-p ery of which 'cooperate with an annular bearing surface 34 on the vertical housing or passaged structure 35 and with an annular bearing surface 36 provided by gear case cap 37. In this manner a bearing is provided for the gear 33 and the screw section 18d which is integral therewith. To prevent the ingress of dirt or coal-dust into the gear housing I provide dust rings 38 which co-operate with a portion of the exterior surface; of the extensions 34. Screw section 18." has astub shaft 39 which projects into section 18d whereby the lefthand end of section 18 is supported by sec-I tion 18d without the -use of the objectionable' dependable bearings. Section 18'L is 'I driven from section 18 by rectangular projection and a c'o-operating jaw shown at,40.

Gear 33 meshes withy a gear 41 which through a sleeve 42 having aws at the upper end drives the vertical screw conveyor 19. Sleeve 42 is. supported on suitable bearings in the lower end of the housing or passagedl structure 35 and inr cap 43. A suitable the right-angle bevel gear conveyor drive f between the vertical and horizontal `conveyors.

'Drive to e'ngz'ne.

22 has an extension 50; at lthe lower end to which the housing of the engine E is bolted. A drive shaft 51 carries a worm 52 which meshes with worm wheel 25. To support the shaft Iprovide ball bearings 53, 54 and 55. sleeves and collars 56, 57, 58 and 59. The^ sleeves57, 58, and collar 59 transmit the thrust of the worm to the bearing 53.

The construction described eliminates external gearing and shafts for driving the vertical conveyor screw. ,The drive from the engine is direct through shaft 51, worm These bearings are spaced apart byn Referring to Figure 2, the gear housing 52, worm wheel 25, screw sections 18h, 18C, 18d, bevel gears 33 and 41 through sleeve 42 to vertical screw 19.

Olz'ng system.

In order to provide for automatically oiling the gearing I provide an oil pump 60 on the end of the engine shaft which forces oil through pipe 61 to the'interior of the worm gear housing. From this housing a drain pipe 62 leads back to the pump. A branch pipeV ,63 leads from pipe 61 to the bevel gear housing. A drain back pipe 64 leads excess oil back from the bevel gear housing to the pump.

What I claim is:

1. The combination with a passaged structure, means to advance material therethroii l1 comprising a rotary screw having its axisextending longitudinally of the axis of the structure, a driving gear coaxial with said screw and having the portion which connects the periphery and the axis portion thereof shaped to form a section of the screw, said section having an e ual pitch with respect to the other convo utions of the screw whereby material -is uniformly Aadvanced through the passaged structure.

2. In a device of the class described, in combination, an advancing means comprising a rotary screw, a passaged structure housing said screw, and also forming a gear housing, a gear having its axis coaxial with that of the screw and withinl said housing a driving gear enmeshing therewith and within said housing, and means associated with said iirst mentioned gear and co-operating with the housing to form a bearing support for the gear. y

3. The invention set forth in claim 2 in which the coaxial gear is also adapted to form a support for the rotary screw whereby an unobstructed passage may be obtained in said passaged structure. Y

4. The invention set forth in claim 2 in which the interior portion of the coaxial gear is in the form of a section of the screw said screw adapted to advance the material through a part of the passaged structure.

5. The invention set forth in claim 2 in which the interior portion of the coaxial gear is in the form of the section of a screw and in which said interior portion eooperates with the rotary screw advancing means to support and drive the same.

6. In a device of the classk described, in combination, a passaged structure, a rotary screw mounted therein and means forsupporting said rotary screw in said passage,

said means comprising a pair of gears having supporting bearing 'portions adjacent their periphery and central portions adapted to co-operate with and support the rotary screw. f

' 7. The 'invention set forth in claim 6 in which the central portion of the gears is in the form 'of a section of the screw whereby the material in the passaged structure is adi "'passageways, each having a conveyor blade,

and means for driving one of said screws from the other, said means including a driving gear mounted coaxially with one of the screws and having a conveyor blade section adapted to cooperate with the blade'of the respective conveyor screw. n

10. The invention set forth in claim 9, in which the driving gear is provided with a peripheral rim providing an external bearing surface for supporting thegear and the adjacent conveyor supported thereon.

1l. The invention set forth in claim 9, in which the passageway wherein said one screw is disposed is'continued through said driving gear which provides an unobstructed passageway, and an oil-tight housing is provided for said gear drive.

12. In a stoker, in combination, a horizontal rotary conveyor element, a vertical rotary conveyor element, vertical and -horizontal passaged structures therefor, a worm wheel mounted in a section of the horizontal passaged structure between the ends of the horizontal conveyor element and adapted to drive and support for rotation the horizontal conveyor element, a driving engine adapted to drive said conveyor elements through the said Worm wheel by lneans of a single shaft and a worm gear, and a bevel gear drive for the vertical conveyor com- )rising a bevel gear coaxial with and driven y the horizontal conveyor and an intermeshing bevel gear coaxial with, and driving the vertical conveyor.

13. In a device of the class described, in combination, a horizontal and a l,vertical conveyor screw, means for driving one from the other, said means comprising a pair of bevel gears, one of said bevel ears havingv screw being detachably llO ' said wheel having peripheral extensionscooperating with the passaged structure, the inner surface of said peripheral extension co-operating with a sealing means to prevent the ingress of dirt from the passaged structure.

17. The invention set forth in claim 15 in which the outer surface of the peripheral extensions is adapted to constitute a support for the worm wheel.

18. In a device of the class described, a passaged structure, a'bevel gear therein, said gear having extended portions adapted to co-operate at their outer surfaces with the passaged structure to form a support vfor the said gear.

19. In a device of the class described, a passaged structure, a bevel gear therein, said gear having extended portions adapted to co-operate at their outer surfaces with sealing means associated with the passaged `cooperating with parts o structure to seal off the interior of the passaged structure from the exterior, said extended portions having -a ortion thereof the passaged Vstructure to form a bearing for the bevel gear.

20. In a device of the class described in combination, a passa ed structure, a rotary screw mounted therein and means for supporting said rotary4 screw in said passage, said means comprising a gear having a supporting bearing portion at its periphery 'and a centralportion adapted to cooperate with and support the rotary screw, and a bearing in said passaged structure adapted to cooperate with the periphery of a portion Iof the screw.

21. In a Stoker, a structure havin a passageway therein, a conveyor screw isposed within said passageway, and a rotary driving member for said screwproviding a section of said structure and being formed to provide an unobstructed continuation of the passageway and providing a rotary support for said conveyor screw.

22. The invention as set forth. in claim 21, in which the driving member is provided with hub and peripheral parts and a supporting part extends between said hub and peripheral parts providing a section of the conveyor screw.

23. The invention as set forth in claim 21, in which the. driving member is provided with hub and peripheral parts and a supporting part extends between said hub and peripheral parts providing a section of the conveyor screw, the adjacent sections of said ,conveyor screw being supported on said hub part.

24. In a s toker, in combination, a conveyor having a sectional screw disposed 1n a conduit or passageway, a plurality of rotary bearing members for said screw for rotatably supporting said screw sections, said bearing members having openings therethrough providing unobstructed conltinuations of said passagewa 25. The invention set fort in claim 24, in which the rotary bearing members are provided with screw blade sections cooperating with the blades of said screwl for advancement of the conveyed material.

26. The invention set forth in claim 24, n-which a screw driving means coo erates with one of said bearing members or rotation of the screw.

27. In a device of the class described, in combination, a conveyor having a sectional screw disposed ina conduit or passageway, a plurality of rotary bearing members for said screw for rotatably supporting said screw sections, said bearing membershaving openings therethrou h providingl unobstructed continuation 0% said passageway, and a peripherally disposed bearing plate within said passageway and adapted to contact directly with the blade of said Screw for rotatably supporting the latter.

28. In a device of the class described, in combination, a structure having a assageway, a conveyor screw disposed wit in saidv passageway, and a' eripherally disposed removable bearing. p ate within said passageway and adapted to contact directly with the blade of said screw for rotatably supporting the latter.

29. In a stoker, in combination, a structureV having a passageway, a conveyor screw `disposed withln sald passageway and including a plurality of sections, and a rotary bearing member having bearing surfaces disposedl exteriorly of said passageway and rotatably supporting adjacent sections of said conveyor screw.

30. In a conveyor, in combination, a structure having a passageway, a conveyor screw disposed within said passageway and including a plurality of sections, and rotary bearing members having bearing surfaces disposed exteriorlybf said passageway and rotatably supporting adjacent sections of said conveyor screw, the blades of adjacent `screw sections cooperating to form a substantially continuous conveyor blade.

31. In a conveyor, in combination, a structure having a passageway, a conveyor screw disposed withinsaid passageway and including a plurality of sections, and a rotary bearing member having bearing surfaces disposed exteriorly of said passageway and rotatably supporting adjacent sections o said conveyor screw, the blades of the adjacent screw sections cooperating to form a conveyor blade continuing substantially uninterruptedly past said bearing i member.

32. In a device of the character described, 130

a structure having angularly disposed passageways, conveyor 'screwsfin each of said passageways each having a conveyor blade, means for driving one of said screws from the other including a driving gear mounted coaxially with one of thescrews and having a conveyor blade section adapted to cooperate with the blade of the respective coilv veyor screw, a peripheral rim for said driv-` ing gear providing an external bearing surface for supporting the gear and the adjacent conveyor screw which is detachably supported thereon, the passageway wherein said driving conveyor screw is disposed being continued through said driving gear which provides an unobstructed passageway, and an oil tight housing for said driving gear.

In testimony whereof I hereunto ax my signature.

JAMES A. CAREY. 

